It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 163 is not a prime number.
For example, 491 163 can be divided by 3: 491 163 / 3 = 163 721.
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For 491 163 to be a prime number, it would have been required that 491 163 has only two divisors, i.e., itself and 1.
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491 163 is an odd number, because it is not evenly divisible by 2.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 491 163 is about 700.830.
Thus, the square root of 491 163 is not an integer, and therefore 491 163 is not a square number.
The square of a number (here 491 163) is the result of the product of this number (491 163) by itself (i.e., 491 163 × 491 163); the square of 491 163 is sometimes called "raising 491 163 to the power 2", or "491 163 squared".
The square of 491 163 is 241 241 092 569 because 491 163 × 491 163 = 491 1632 = 241 241 092 569.
As a consequence, 491 163 is the square root of 241 241 092 569.
The multiples of 491 163 are all integers evenly divisible by 491 163, that is all numbers such that the remainder of the division by 491 163 is zero. There are infinitely many multiples of 491 163. The smallest multiples of 491 163 are: